/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package remoting.channel;


import common.exception.RemotingException;
import common.util.Assert;

public abstract class AbstractChannelHandlerDelegate implements ChannelHandlerDelegate {

  protected ChannelHandler handler;

  protected AbstractChannelHandlerDelegate(ChannelHandler handler) {
    Assert.notNull(handler, "handler == null");
    this.handler = handler;
  }

  @Override
  public ChannelHandler getHandler() {
    if (handler instanceof ChannelHandlerDelegate) {
      return ((ChannelHandlerDelegate) handler).getHandler();
    }
    return handler;
  }

  @Override
  public void connected(Channel channel) throws RemotingException {
    handler.connected(channel);
  }

  @Override
  public void disconnected(Channel channel) throws RemotingException {
    handler.disconnected(channel);
  }

  @Override
  public void sent(Channel channel, Object message) throws RemotingException {
    handler.sent(channel, message);
  }

  @Override
  public void received(Channel channel, Object message) throws RemotingException {
    handler.received(channel, message);
  }

  @Override
  public void caught(Channel channel, Throwable exception) throws RemotingException {
    handler.caught(channel, exception);
  }
}
